\usepackage{ctex}
\usepackage{booktabs}
\usepackage{longtable}
\usepackage{array}
\usepackage{multirow}
\usepackage{wrapfig}
\usepackage{float}
\usepackage{colortbl}
\usepackage{pdflscape}
\usepackage{tabu}
\usepackage{threeparttable}
\usepackage{threeparttablex}
\usepackage{makecell}
\usepackage{xcolor}
\usepackage{xtab}

\def\begincols{
\begin{columns}} \def\begincol{\begin{column}} \def\endcol{\end{column}} \def\endcols{\end{columns}
}


